1 /* @(#)parser5.c 8.1 (Berkeley) 6/6/93 */
2 /* $NetBSD: parser5.c,v 1.7 2009/04/14 08:50:06 lukem Exp $ */
5 * Copyright (c) 1983, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
9 * Edward Wang at The University of California, Berkeley.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 p_expr11(struct value *v, char flag)
69 return p_expr12(v, flag);
73 if (p_expr11(v, flag) < 0)
83 p_error("%s: Numeric operand required.", opname);
95 if (v->v_type == V_NUM) {
96 int tmp = cx.x_type == X_BUF && cx.x_arg != 0 &&
97 v->v_num > 0 && v->v_num <= cx.x_narg;
101 *v = cx.x_arg[v->v_num - 1];
103 p_error("%d: No such argument.", v->v_num);
107 char *name = v->v_str;
108 struct var *r = var_lookup(name);
111 v->v_num = r != NULL;
112 } else if (r != NULL)
115 p_error("%s: Undefined variable.", name);
120 if (v->v_type == V_STR && (v->v_str = str_cpy(v->v_str)) == 0) {
126 v->v_num = - v->v_num;
129 v->v_num = ! v->v_num;
132 v->v_num = ~ v->v_num;
139 * string, number, ( expr )
140 * Plus function calls.
142 * Always return v_type == V_ERR when flag == 0.
145 p_expr12(struct value *v, char flag)
152 v->v_num = token_num;
159 v->v_str = token_str;
166 if (p_expr(v, flag) < 0) {
180 while (token == T_LP) {
183 if (p_convstr(v) < 0)
185 cmd = v->v_type == V_STR ? v->v_str : 0;
186 if (p_function(cmd, v, flag) < 0) {